Coil mounting for radio apparatus



Dec. 18V, 1923. 1,4775822 l. GREENWALD COIL MOUNTING FOR RADIO AAPPARATUS Filed Aug. 10. 1922 A TTORNEY Patented Dec. 18, 1923.

UNITED STATES PATENT OFFICE.y

ISIDOR GREENWALD, 0F NEW YORK, N. Y., ASSIGNOR TO ASTORLOID MANUFACTURING CO. INC., OF BROOKLYN, NEW YORK, A

CORPORATION 0F NEW YORK.

COIL MOUNTING FOR RADIO APPARATUS.

Application led August 10, 1922. Serial No. 580,913.

Toy all whom it may concern.'

:Be it known that I, IsIDoR GREENWALD, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in a Coil Mounting for Radio Apparatus, of which the following is a full, clear, and exact specifcation.

This invention relates toa class of devices adapted to be used in conjunction with wireless telegraph systems.

My invention has for its object primarily to provide a mounting designed to be employed for removably interposing three cooperative receiving coilsin a wireless 'electric system Iwhereby the wave currents received may be regulated to vary the clearness of the sounds transmitted, and which is of a manually operative type tending to obviate liability of the bodyof the attendant of the apparatus to interfere with the,

electric field surrounding the receivers by conductive absorption of the wave currents. The invention consists essentially of an insulated base having three spaced pairs of alined electric conductors, each including an insulated socket and a spaced insulated post so that three co-operating receiving coils adapted lfor wireless electric systems may be removably mounted on the base in spaced parallel arrangement. When in use the base is supported so that the wiring of the aerial of the wireless system leads separately to each socket and each ost ofeach conductor. The central pair o 4conductors are stationary on the base, while the other conductors are adapted to be rotatably swung toward and from the stationary conductors for varying the space between the receiving coils so that the clearness of the sounds received may be regulated, and means is provided whereby the rotatable conductors may be manually adjusted at a distance for serving to prevent the bod of the operator from conductively interfering with the electric .field surrounding the recelvingf coils. p

- A further object of the invention is to rovide a coil mounting of a simple, et'- gcient and durable-construction which may be made in any suitable form and size.

4TVith these and' other objects in view,

the invention will be hereinafter more fully explained with reference to the accompanying drawing forming a part of this speciication in which similar characters. of reference indicate corresponding parts in all the views, and will then be pointed out in the claims at the end of the description.

In the drawing, Figure 1 is a side elevation of one form of coil mounting embodyin my invention.

ig. 2 is a top plan of the device.

Fig. 3 is a sectional view, partly in detail, taken on the line 3 3 of Fig. 2 and which shows in dotted lines part of a form of receiving coil for being supported by the mounting, and

Fig. 4 is a sectional view, partly in detail, taken on the line 4-4 of Fig. 2.-

The device or mounting has a 'base 10 which may be of vulcanized rubber, fibre or other suitable insulating material, and this base has a bottom plate 11 of preferably a substantially rectangular shape, on the upper face of which at its.side edges are two walls 12, 13 disposed in spaced parallel arrangement. The walls 12, 13 may be of suitable heights, and may be of lengths similar to the length of the bottom plate.

Between the insulated side walls 12, 13 of the vbase 10 are spaced pairs of alined electric conductors, as 14, 15, 16, each pair including a metallic post 17 and a metallic socket .18 which is in alinedspaced relation to the post. The post and socket of each pair of the conductors are separately insulated by vulcanized rubber or other insulating material. Thus there are three of the insulated blocks, as 19, 20, 21, which are Apreferabl of substantially rectangular shapes, and a l of the blocks are disposed edgewise in spaced parallel relation across the space between the side walls 12, 13 of the r4base 10. All of the insulated blocks maybe arranged so that their upper edges are on similar planes to the u per edges of the side walls of the being embedded in a block of.

base, an K the blocks are'of sizes so that their lower edges are spaced from the 'bottom plate of the base. The posts'l? of the cond uctors are' of lengths so that their upper ends rotrude some distance above the upper e ges of the insulated blocks 19, 20, 21,

' side wall 12 of the base.

and the upper open ends of the sockets of the conductors terminate flush with the upper edges of the 'blocks so that receiving coils, as A, B, C, of well-known forms ada ted for wireless electric systems, each having on its lower end a protruding conductive post, as D, and having a spaced conductive socket, as C, may be removably mounted on the blocks and tconductively interposed in the wireless system by the posts D of the coils being seated in the sockets 18 of the conductors 14, 15, 16 and by the posts 17 of the conductors being disposed in the sockets C ot the coils. The post 17 and socket 18 of the central conductor 15 are held stationary on the base 10 for likewise holding in :fixed position the receiving coil B by the insulated block 2O being secured to the base by one or two spaced bolts or screws, as 22, 23, being driven through threaded holes in the side wall 12 ot the base and in threaded sockets in the block 20 and also by one or two spaced bolts or screws, as 24, 25, engaging holes in the side wall 13 ot the 'base and in threaded sockets in this block. The screws 22 and 24 are of lengths so that they conductively engage the post and the socket of the conductor 15, while the screws 23 and 25 may be separated from the post and socket.

The posts and sockets of the conductors 14 vand 16 are adapted to be rotatably swung toward and from the stationary conductors 15 for permitting the receiving coils A and C to be adjustably spaced from the receiving coil B, and this is accomplished by providing a manually operative mechanism, as 26. The mechanism 26 has two studs 27, 27 having one of their endsjournaled in holes in the side wall 13 of the base 10, and the other end portions the blocks 19 and 21 as well as having threaded ends which in threaded holes provided in thelower ends or' the sockets 13 ot the conductors 14 and 16. In threaded holes provided in the lower ends of the posts 17 of the conductors is screwed, as at 29, the threaded ends of two shafts 30, 31, portions of both of which are embeddedin the blocks 19 and 21, and the shafts are also journaled in holes in the side wall 12 of the base 10. The shafts 30, 31 are preferably 'of lengths so that their outer ends extend beyond the electric lield surrounding the receiving coils and the base when the device is in use, and these shafts are ,also rotatably disposed through fixed sleeves, as 32, 33, which protrude from the On the outer ends of the shafts 30, 31 are held worm gears 34, 35, and on the outer ends of the sleeves 32. 33 are held corresponding brackets 36, 37. Each of the brackets are substantially U- shaped and both brackets are disposed above va length so that the of the studs are embedded in are screwed, as at 28,A

35 as well as being arthe worm gears 34,

divergmg molines so ranged on upward that the free ends of the arms of the brackets` are in spanning positions relative to the worm gears. ln registered holes in the ends ot the larms of the U-shaped brackets are journaled the lower ends of two rods or shafts 38, v39 which are also disposed on upward (livel-ging inclines. On the part of the rods 38, 39 between the arms of the U- shaped brackets are worms 40, 41 which are in mesh with the worin gears 34, 35 of the shafts 30, 31, and on the upper ends of the rods are provided heads or knobs or handles 42, 43 of suitable insulating material. When the rods 38, 39 are rotated by revolving the handles 42, 43 accordingly the rods 38, 39 and worms 40, 41 will be likewise revolved for rotatably swinging the blocks 19, 21 toward and from the block 20 to adjustably space the receiving coils A and C with relation to the receiving coil B for regulating the clearness ot the sound waves in the wireless electric system to which the device is applied. The movements ot the coils A and (l toward the coil B may be limited by stops, `as 44, 45, both ot' which are provided by a single rod which is embedded in the stationary insulating block 20 as well as being of ends of the rod extend in opposite lateral directions from the block 20 toward the insulating blocks 19 and 21 which in turn will be limited in their movements to determined distances towardv the block 20.

When the device is employed in conjunction with a wireless electric system the'base tric wires, as E, leading trom the aerial may,

Each of the bind'- as 5t), and one oi' be connected to the base. ing posts has a rod screw,

the end parts of all of the screws are screwed in spaced threaded sockets, as 5l. provider in the lower edges ot the walls of, the base. Two of the sockets 51 `terminate at the studs 27, 27 a, while two of the other sockets terminate at the shafts 30, 31, and two of the sockets terminate at the screws or bolts 22, 24 of the stationary block. All of the screws 50 are oflengths as well as being arranged so that their ends within the sockets are spaced from the bottoms of the sockets, while the other end portions of the screws protrude some distances from the underside of the base. he a spiral spring52 of metal, and, one o the ends of all of the springs engage the screws 50 of the binding posts to provide In each of the sockets 51 may and the conductors 14, 15, 16 through the studs 27, 27, shafts 30, 31 and screws 22,

`241. The springs 52 also provide yielding connections with the studs 27,27a and shafts 30, 31 to allow free functioning of the studs and shafts when rotated, as above explained, In practice the coils A. B, C will receive the electric currents over the wires E, through the binding posts 47, 47, 48, 48, 49, 49a over the studs 27, 27, shafts 30, 31, screws 22, 24, through the posts 17, and sockets 18 of the conductors 14, 15, 16 to and through the terminal posts D and the terminal sockets C of the receiving coils.

In the foregoing description, I have embodied the preferred'form of my invention, but I do not wish to be understood as limiting myself thereto, as I am aware that modiications may be made therein without departing from the principle or sacrificing any of the advantages of this invention, therefore, l reserve to myself the right to make such changes as fairly fall within the scope thereof. i

Having thus described my invention, `l claim as new and desire to secure by Letters Patent:

1. A coil mounting as characterized, comprising-ian insulated base having a bottom wall with two protruding spacedpwalls, tree spaced insulated blocks between the walls of the base, the central block being stationary and the -other blocks adapted to be rotatabiy swung toward and from the stationary block, three conductive posts, one embedded in and protruding upwardly from each of the blocks, three conductive sockets, one embedded in each of the blocks in'spaced relation to its post, a pair of bindin from he base, one being connected to the post of the stationary block and the other connected to the socket of theV stationary post, two conductive studs jdurnaled in one of the walls of the base and each of the studs leading to the socket of one of the rotatable blocks, two other binding posts embedded in and extending from the base, eachbeing connected to and ieldingly contacting with each of the stu s, two conductive shafts journaled in the other wall of the base and each ofthe shafts leading to the post of one of the rotatable blocks, both of said shafts extending be ond the base `:two more binding posts embedded in and projecting from the base, each connected to and yieldingly contactin with each of the shafts, and jmeans on t ually operative for rotatingreach shaft Separately for rotatably adjusting the rotatable blocks.

2. A coil mounting as characterized, coinprising an insulated base having a bottom wall'with two protruding spaced Walls,thr ee posts embedded in and projecting e shaft, man-- Slpaced insulated blocks between the walls of tie baise, the central block being stationary and the other blocks adapted to be rotatably swung toward and from the stationary block, three conductive posts, one elnbedded in and protruding upwardly from each of the blocks, three conductive sockets, one embedded in each of the blocks in spaced relation to its post, a pair of binding posts embedded in and rojecting from the base, one connected tot e post of the stationary block and the other being connected tosthe Socket of the stationary post, two conductive studs jonrnaled in one of the Walls of the base and each of the studs leading to the socket of one of. the rotatable blocks, two other binding posts embedded in and extending from the base, each connected to and yieldingly contacting with each of the studs, two conductive shafts jonrnaled in the other wall of the base and each of the shafts leading to the post of one of the rotatable blocks, both of said shafts eX- tending beyond the base, two more binding posts embedded in and projecting from the ase, each connected to and yieldingly contacting with each of'the shafts, a worm gear fixed on the outer end of each of the shafts, two worms, each worm meshing with the worm gear of one of the shafts, and two handles, one on each lworm 'to allow the shafts to be manually revolved for rotating the rotatable blockstoward and from the stationary block.

3. A coil mounting as characterized, comprising an insulated base having a bottom wall with two protruding spaced walls, three spaced insulated blocks between the walls of the base, the central block being'stationary and the other blocks adapted to be rotatably swung toward and from the stationary block, three conductive posts, one embedded in and protruding upwardly from each of the blocks, three conductive sockets, one embedded in each of the blocks in spaced relation to its post, a pair of binding osts embedded in and projectingr from the ase, one connected to the post ofthe stationary block and the other connected to the Socket of the stationary post, two conductive studs journaled in one. of the walls of the base and each of the studs leading to the socket of one of the rotatable blocks, two other binding posts embedded in and extending from the base, each connected to and yieldingly contacting with each of the studs, two conductive shafts journaled in the other vwall of the base and each of the shafts leading to the post Vof one-of the rotatable blocks, both of said shafts `extending bevond the base, two more binding posts embedded in and projecting from the base, each connected to and yieldingly contacting with each of the shafts, a worm gear fixed www@ on the outer end of each of the shafts, two blocks towar and from 'the stationary l brackets each on the -outenend of one of block. the shafts, two Worms, each rotatably This s ecicaton signed and witnessed mounted on one of the brackets and each this 9th ay of August, A. D. 1922.

worm meshing with the worm gear of each SIDOR GREEN'VALD..

of the shafts, and two handles, one on Witnesses: eachwvorm to allow the shafts to be man UMAGUIRE,

nully revolved for rotatingthe rotatable VJ. FREDERICK CRYER. 

